What is a Digital Signature Certificate (DSC)?
The Information Technology Act, 2000 provides for use of Digital Signatures on the documents submitted in electronic form in order to ensure the security and authenticity of the documents filed electronically. This is the only secure and authentic way that a document can be submitted electronically. As such, all filings done by the companies under MCA21 e-Governance programme are required to be filed with the use of Digital Signatures by the person authorised to sign the documents.
You can use only the valid Digital Signatures issued to you. It is illegal to use Digital Signatures of anybody other than the one to whom it is issued.